What is the normal shape of diaphragm?

Explanation

**Step-by-Step Solution:**

1. **Definition of the Diaphragm**: The diaphragm is a muscle that plays a crucial role in the respiratory system. It separates the thoracic cavity (chest) from the abdominal cavity.

2. **Normal Shape**: The normal shape of the diaphragm is described as "dome-shaped." This means that when viewed from the side, it has a curved, upward bulge.

3. **Function During Breathing**:
- **Inhalation**: When a person inhales, the diaphragm contracts and flattens. This contraction increases the volume of the thoracic cavity, allowing air to be drawn into the lungs.
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